20102102 has 12 divisors (see below), whose sum is σ = 30541740. Its totient is φ = 9923148.

The previous prime is 20102099. The next prime is 20102111. The reversal of 20102102 is 20120102.

It is a self number, because there is not a number n which added to its sum of digits gives 20102102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13049 + ... + 14507.

It is an arithmetic number, because the mean of its divisors is an integer number (2545145).

Almost surely, 2^20102102 is an apocalyptic number.

20102102 is a deficient number, since it is larger than the sum of its proper divisors (10439638).

20102102 is an equidigital number, since it uses as much as digits as its factorization.

20102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1544 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20102102 is about 4483.5367735751. The cubic root of 20102102 is about 271.9028902907.

Adding to 20102102 its reverse (20120102), we get a palindrome (40222204).

The spelling of 20102102 in words is "twenty million, one hundred two thousand, one hundred two".